IssueTracker

Please include a sample project that reproduces your issue. None of the room-paging artifacts have any strict dependencies on Paging.

There shouldn't be a strict version requirement, room-paging depending on paging-common:3.1.1 should be able to get upgraded to 3.2.0-alpha01.

By any chance are you hitting this while running an instrumented test? The version of paging should resolve the same between for both the main apk and test apk, but the way this is exposed is unfortunately as a version requirement.

Otherwise, if you can share your build.gradle it would help us reproduce the issue, it's possible we're missing a version constraint that could better guide how Gradle resolves the paging-common version.

Hi, no we are not using during instrumented test but just a normal run from AS will encounter the crash.

Not sure what went wrong but excluding the transitive dependency group androidx.paging from room-paging seems to work and androidx.paging:paging-common:3.1.1 no longer shown as strictly in the app:dependencies task.

If you're able to reproduce this in a sample project, please attach it here and we can reopen the issue and take a look.

I also ran into this, it is fairly easy to reproduce on my end. I need to add dependency on both paging-runtime and paging-compose:

    implementation 'androidx.paging:paging-runtime:3.1.1'
    implementation 'androidx.paging:paging-compose:1.0.0-alpha15'

And then eg. creating a PagingDataAdapter will cause a crash:

        val adapter = object : PagingDataAdapter<String, RecyclerView.ViewHolder>(object : DiffUtil.ItemCallback<String>() {
            override fun areItemsTheSame(oldItem: String, newItem: String) = true
            override fun areContentsTheSame(oldItem: String, newItem: String) = true

        }) {
            override fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int) = TODO()
            override fun onCreateViewHolder(parent: ViewGroup, viewType: Int) = TODO()
        }

java.lang.NoSuchMethodError: No direct method <init>(Landroidx/paging/DifferCallback;Lkotlinx/coroutines/CoroutineDispatcher;)V in class Landroidx/paging/PagingDataDiffer; or its super classes (declaration of 'androidx.paging.PagingDataDiffer' appears in /data/app/~~QVBQXUo_41J0PPyeyQkLkA==/com.example.pagingcrashrepro-b6_Qq8aKQlwtI2MEGllfnw==/base.apk)
                                                                                                    	at androidx.paging.AsyncPagingDataDiffer$differBase$1.<init>(AsyncPagingDataDiffer.kt:78)
                                                                                                    	at androidx.paging.AsyncPagingDataDiffer.<init>(AsyncPagingDataDiffer.kt:78)
                                                                                                    	at androidx.paging.PagingDataAdapter.<init>(PagingDataAdapter.kt:78)
                                                                                                    	at androidx.paging.PagingDataAdapter.<init>(PagingDataAdapter.kt:61)
                                                                                                    	at com.example.pagingcrashrepro.MainActivity$onCreate$adapter$1.<init>(MainActivity.kt:17)
                                                                                                    	at com.example.pagingcrashrepro.MainActivity.onCreate(MainActivity.kt:17)
                                                                                                    	at android.app.Activity.performCreate(Activity.java:8054)
                                                                                                    	at android.app.Activity.performCreate(Activity.java:8034)
                                                                                                    	at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1341)
                                                                                                    	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3666)
                                                                                                    	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3842)
                                                                                                    	at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:103)
                                                                                                    	at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
                                                                                                    	at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
                                                                                                    	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2252)
                                                                                                    	at android.os.Handler.dispatchMessage(Handler.java:106)
                                                                                                    	at android.os.Looper.loopOnce(Looper.java:201)
                                                                                                    	at android.os.Looper.loop(Looper.java:288)
                                                                                                    	at android.app.ActivityThread.main(ActivityThread.java:7842)
                                                                                                    	at java.lang.reflect.Method.invoke(Native Method)
                                                                                                    	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)
                                                                                                    	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1003)

If I downgrade paging dependency to alpha14, the crash does not happen.

You must use paging 3.2.0-alpha01 with paging-compose:1.0.0-alpha15.

You must use paging 3.2.0-alpha01 with paging-compose:1.0.0-alpha15.

Ok, then I have a couple of follow ups, in no particular order:

• Is this documented somewhere?
• Why does it not fail at compile time, instead of runtime?
• Why doesn't paging-compose:1.0.0-alpha15 then force the other dependency to update to 3.2.0-alpha01?
• If there is no other way that to fail at runtime, could there be a better error message at least?

Re comment#9 - Paging Compose 1.0.0-alpha15 already has a required dependency on Paging 3.2.0-alpha01, which you can see in the POM file of Paging Compose 1.0.0-alpha15. Gradle already automatically upgrades you to use the correct version of Paging because of that required dependency.

If you have a sample project where you are not seeing that happen automatically, please attach it here.

Repro project: https://github.com/ferinagy/paging-crash-repro

This is more of an issue with Gradle than anything else - leaving out the dependency on paging-runtime would automatically upgrade you to the correct version of paging-common, but your explicit dependency overrides that default behavior.

Gradle does offer the ability to set constrants, which would help enforce this even if you do explicitly set the wrong version. We can add that between paging-common and paging-compose.